INFO: task syz.4.16:482 blocked for more than 122 seconds.
      Not tainted 6.12.30-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.16        state:D stack:0     pid:482   tgid:480   ppid:462    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:419 [inline]
 do_coredump+0x7db/0x2b50 fs/coredump.c:576
 get_signal+0x11fd/0x14f0 kernel/signal.c:2904
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f59b658e929
RSP: 002b:00007f59b73110e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f59b67b6088 RCX: 00007f59b658e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f59b67b608c
RBP: 00007f59b67b6080 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f59b67b608c
R13: 0000000000000000 R14: 00007ffe3a18c630 R15: 00007ffe3a18c718
 </TASK>
INFO: task syz.3.19:489 blocked for more than 123 seconds.
      Not tainted 6.12.30-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.19        state:D stack:0     pid:489   tgid:483   ppid:467    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:419 [inline]
 do_coredump+0x7db/0x2b50 fs/coredump.c:576
 get_signal+0x11fd/0x14f0 kernel/signal.c:2904
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3b0f58e929
RSP: 002b:00007f3b103fd0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f3b0f7b6088 RCX: 00007f3b0f58e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3b0f7b608c
RBP: 00007f3b0f7b6080 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b0f7b608c
R13: 0000000000000000 R14: 00007fffbdc88f90 R15: 00007fffbdc89078
 </TASK>
INFO: task syz.5.18:490 blocked for more than 123 seconds.
      Not tainted 6.12.30-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.18        state:D stack:0     pid:490   tgid:485   ppid:466    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:419 [inline]
 do_coredump+0x7db/0x2b50 fs/coredump.c:576
 get_signal+0x11fd/0x14f0 kernel/signal.c:2904
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f8084b8e929
RSP: 002b:00007f8085a150e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f8084db6088 RCX: 00007f8084b8e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f8084db608c
RBP: 00007f8084db6080 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8084db608c
R13: 0000000000000000 R14: 00007fff3e820910 R15: 00007fff3e8209f8
 </TASK>
INFO: task syz.1.17:491 blocked for more than 123 seconds.
      Not tainted 6.12.30-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.17        state:D stack:0     pid:491   tgid:487   ppid:463    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:419 [inline]
 do_coredump+0x7db/0x2b50 fs/coredump.c:576
 get_signal+0x11fd/0x14f0 kernel/signal.c:2904
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3a5438e929
RSP: 002b:00007f3a552010e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f3a545b6088 RCX: 00007f3a5438e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3a545b608c
RBP: 00007f3a545b6080 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3a545b608c
R13: 0000000000000000 R14: 00007fff6b916820 R15: 00007fff6b916908
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller #0 cb005039091fdf48961fa05e2d6610641e03ef7b
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xbd4/0xc20 kernel/hung_task.c:379
 kthread+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.30-syzkaller #0 cb005039091fdf48961fa05e2d6610641e03ef7b
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:106
Code: cc cc cc b8 87 64 2c ef 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 61 4d 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> e9 43 f4 05 00 cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6f00000 RBX: ffff888103652280 RCX: ffffffff8539e98e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 000000000004bfb4
RBP: ffffc900001a7e00 R08: ffff8881f6f395f3 R09: 1ffff1103ede72be
R10: dffffc0000000000 R11: ffffed103ede72bf R12: 1ffff110206ca450
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff87631d68
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555883924a8 CR3: 000000010abae000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:112 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:747
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:784
 default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x1a0/0x470 kernel/sched/idle.c:326
 cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:424
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>